Soil Volume Calculator

Calculate soil volume for raised beds, garden beds, planters, pots, lawns, landscaping, and fill areas. Estimate cubic feet, cubic yards, cubic meters, bags of soil, soil weight, waste allowance, and total soil cost.

Calculate Soil Volume

Rectangular Soil Volume = Length × Width × Depth.
Your result will appear here.

How the soil volume calculator works

Rectangle bed:
The calculator multiplies length by width by soil depth to estimate volume for raised beds, garden beds, lawns, and rectangular fill areas.

Round planter:
The calculator uses radius and depth to estimate soil volume for circular beds, tree rings, round planters, and pots.

Flower pot:
The calculator estimates tapered container volume using top diameter, bottom diameter, and depth.

Known volume:
Enter a known volume to convert between cubic feet, cubic yards, cubic meters, gallons, liters, quarts, bags, weight, and cost.

Why use a soil volume calculator?

A soil volume calculator helps estimate how much soil, potting mix, compost, or fill material you need before buying bags or ordering bulk delivery.

It can be useful for raised beds, garden beds, planter boxes, flower pots, lawns, landscaping, tree planting, container gardening, and soil amendment projects.

What your result means

Your result shows soil volume before and after extra allowance, cubic feet, cubic yards, cubic meters, gallons, liters, bags needed, estimated weight, bag cost, bulk soil cost, and total cost. These are planning estimates based on your dimensions, bag size, density, and prices.

Soil volume formulas

Frequently asked questions

How do you calculate soil volume?

For a rectangular bed, multiply length by width by depth using the same unit. Convert the result to cubic feet or cubic yards as needed.

How many cubic feet are in a cubic yard of soil?

One cubic yard equals 27 cubic feet.

How many bags of soil do I need?

Divide your total cubic feet of soil needed by the cubic feet per bag, then round up to the next whole bag.

Should I add extra soil for settling?

Yes. A 5% to 15% extra allowance can help account for settling, compaction, uneven areas, spills, and measurement differences.